|
|
03-31-2012 11:41 PM | |
tommy |
Re: Total momentary loss of control Remove your receiver switch and tape it to a hand sander pad,connect up a holm meter to the same colored wire. Turn on the receiver switch and check for a reading,once you get a reading turn on the sander.If the reading varys renew the switch.I had simlar problems and did not fly the plane.This winter I had a variable charge in this system and thought my charger was toast.Then I did this test and it was the switch,it was badly croaded when I took it apart,also it was very old.So I cut off the ends and replaced it after cleaning it up.It may have been OK but I scrapped it,Problem solved.Batterys now charge up. |
03-08-2012 03:52 AM | |
supercub1974 |
Re: Total momentary loss of control My problem was with a broken elevator hinge, not the transmitter. One half of the elevator was free and flapping at higher speeds, that caused the loss of control. Read down through again you must have missed that part. My DX7 works great. |
03-07-2012 11:13 PM | |
littlered |
Re: Total momentary loss of control i just finished writing a new thread. i have a dx7 the one with the toggle just before they came out with the thumb wheel. i have two planes with the ar600 rx and have had 4 crashes with total loss of control, NOW after reading about your problems my dx7 is going back in the box. maybe i'll look at a jr i also have w walkira 2901 and several rx's |
02-27-2012 05:48 PM | |
spitrc |
Re: Total momentary loss of control Its been doing this the last 4 or 5 times I had it in the air. So , what was your first clue that something was wrong? AS this is item up at the top again. Ok, guys, When you have a problem. LAND immediately and find it and fix it. In the air is not a good place to find it and it will cost more. Fly safe, have a good season. Larry |
02-27-2012 04:22 PM | |
Cougar429 |
Re: Total momentary loss of control Your problem with the switch sounds like what we call "Black Wire Disease". The outer sheath on the wire and the exterior of a switch may look fine, but the conductive metal will degrade over time. In some cases if you peel back the insulation the conductor can have the consistency of powdered graphite. This ONLY occurs over a long time with a battery containing charge connected. Disconnect the battery for long term storage and it will not happen, although there is no way to prevent the same tendency on the battery leads themselves. NOTE 1: electrons are carried only along the outer surface of a conductor, (the reason for a stranded conductor is that the surface area for a given diameter is greater. Unfortunately damage due to corrosion also begins on the other surface as that is the portion initially in contact with air. Any degradation in a conductor seriously reduces the amount of current it can carry and the effect is worse if pushed enough to cause heating. You may still see voltage at both ends, but the conductor may only be able to carry a fraction of the rated current, causing the system to sag or fail under load. NOTE 2: Most of the common radio flight system switches, (and the wiring connected to them) are rated for only 4A. Years ago in the age of analog servos this was more than adequate. Unfortunately with larger models requiring a higher number of servos, and upgrading to digitals, which are notorious current hogs on a good day, then using a standard switch and harness can again lead to failure even if everything is in perfect condition. |
02-27-2012 04:41 AM | |
supercub1974 |
Re: Total momentary loss of control I have been flying this plane after fixing the elevator with no problem(knock on wood), although I can see where a faulty or worn out switch can cause major trouble. I will check that out. |
02-26-2012 10:01 PM | |
tommy |
Re: Total momentary loss of control I had a similar problem last year, control would come and go.This winter I done some serious tests and came to the reciever switch,it has a variable resistance,and some times did not charge properly either.This switch is 10 years old?or older.It is a Hitec product,and had went through hell and back. |
11-10-2011 10:53 AM | |
scochrane |
Re: Total momentary loss of control Check the antenae wire inside the transmitter. Mine broke and the plane would fly inside 300' okay but past that went wonky. Was lucky that the crash didn't to too much damage and I crashed into corn. As bad as hitting a tree. |
11-09-2011 05:33 PM | |
Cougar429 |
Re: Total momentary loss of control I hate to admit it, but yes, I do remember sewn hinges. One long hinge you could cut to lengths comes to mind, as well. That was back when I was silk and doping. Surprised any brain cells survived that era. |
11-09-2011 12:13 PM | |
roscoe |
Re: Total momentary loss of control Or fabric hinges? A 3/4" wide strip of fabric doped onto the top of the stab, and bottom of elevator, and a second strip doped on in reverse; ie top of elevator and bottom of stab, thus forming a strong friction free hinge that will never come off. AAAK! dated myself again. |
This thread has more than 10 replies. Click here to review the whole thread. |